421608449 has 8 divisors (see below), whose sum is σ = 446591880. Its totient is φ = 396645376.

The previous prime is 421608433. The next prime is 421608479. The reversal of 421608449 is 944806124.

It can be written as a sum of positive squares in 4 ways, for example, as 11950849 + 409657600 = 3457^2 + 20240^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421608449 - 2⁴ = 421608433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421608419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66197 + ... + 72285.

It is an arithmetic number, because the mean of its divisors is an integer number (55823985).

Almost surely, 2^421608449 is an apocalyptic number.

It is an amenable number.

421608449 is a deficient number, since it is larger than the sum of its proper divisors (24983431).

421608449 is a wasteful number, since it uses less digits than its factorization.

421608449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10179.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 421608449 is about 20533.1061702802. The cubic root of 421608449 is about 749.8420105733.

The spelling of 421608449 in words is "four hundred twenty-one million, six hundred eight thousand, four hundred forty-nine".